A Wimshurst machine is an electrostatic generator that creates high voltages using two counter-rotating disks, usually made of glass. The disks contain a series of metal sectors that pass close to metal combs, producing sparks and generating a current. Synonyms for Wimshurst machine include electrostatic generator, influence machine, frictional generator, and high voltage generator. The machine was invented in the late 19th century by James Wimshurst and was widely used in scientific experiments, particularly for X-ray generation. Today, Wimshurst machines remain popular among hobbyists and enthusiasts, who use them for many different purposes, including teaching and entertainment.